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Finding the Fourth Proportional to 560.12, 840.11 and 286.43

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Solution

The fourth proportional to 560.12, 840.11 and 286.43 is: 429.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    560.12 : 840.11 = 286.43 : x
  2. Step 2: Convert to fraction form
    560.12/840.11 = 286.43/x
  3. Step 3: Cross multiply
    560.12x = 840.11 × 286.43
  4. Step 4: Simplify right side
    560.12x = 240,627.07
  5. Step 5: Solve for x
    x = 240,627.07/560.12
  6. Step 6: Final answer
    x = 429.60

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.